Toyota Corolla (E170): Shift position purpose

*: To improve fuel efficiency and reduce noises, set the shift lever in D for

*: To improve fuel efficiency and reduce noises, set the shift lever in D for normal driving.

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    Wiring
    Power source Location ...

    Circuit description
    The variable valve timing (vvt) system includes the ecm, the oil control valve (ocv) and the vvt controller. The ecm sends a target ”duty–cycle” control signal to the ocv. This control signal, applied to the ocv, regulates the oil pressure supplied to the vvt controller. Camshaft timin ...

    On–vehicle inspection
    1. Inspect refrigerant pressure with manifold gauge set  this is a method in witch the trouble is located by using a manifold gauge set. Read the manifold gauge pressure when the these conditions are established. Test conditions: temperature at the air inlet with the switch set ...